/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2D3748;
    --secondary-color: #E9E2F1;
    --accent-color: #6B46C1;
    --text-light: #718096;
    --text-dark: #2D3748;
    --white: #FFFFFF;
    --gradient-bg: linear-gradient(135deg, #E9E2F1 0%, #F7FAFC 100%);
    --shadow-light: 0 4px 6px rgba(45, 55, 72, 0.1);
    --shadow-medium: 0 10px 25px rgba(45, 55, 72, 0.15);
    --border-radius: 12px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--gradient-bg);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 0 60px;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--primary-color);
    line-height: 1.2;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.inline-logo {
    height: clamp(80px, 12vw, 140px);
    width: auto;
    vertical-align: middle;
    filter: drop-shadow(0 4px 8px rgba(45, 55, 72, 0.1));
}

.highlight {
    color: var(--accent-color);
    position: relative;
    display: inline-flex;
    align-items: center;
}

.highlight::after {
    display: none;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.3rem);
    color: var(--text-light);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section - Chat Demo */
.features {
    padding: 80px 0;
    display: flex;
    justify-content: center;
}

.chat-demo {
    max-width: 400px;
    width: 100%;
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-medium);
    overflow: hidden;
    border: 1px solid rgba(233, 226, 241, 0.5);
}

.chat-header {
    background: linear-gradient(135deg, var(--primary-color), #4A5568);
    color: var(--white);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}

.chat-sara-avatar {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.chat-info h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.chat-status {
    font-size: 0.8rem;
    opacity: 0.9;
}

.chat-messages {
    padding: 20px;
    height: 400px;
    overflow-y: auto;
    background: #F8FAFC;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: messageSlideIn 0.3s ease;
}

.sara-message {
    align-self: flex-start;
}

.user-message {
    align-self: flex-end;
}

.message-content {
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 0.9rem;
    line-height: 1.4;
    position: relative;
}

.sara-message .message-content {
    background: var(--white);
    color: var(--text-dark);
    border: 1px solid #E2E8F0;
    border-bottom-left-radius: 6px;
}

.user-message .message-content {
    background: linear-gradient(135deg, var(--accent-color), #8B5CF6);
    color: var(--white);
    border-bottom-right-radius: 6px;
}

.message-time {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-top: 4px;
    align-self: flex-end;
}

.user-message .message-time {
    align-self: flex-start;
}

.message-image {
    margin: 0;
    border-radius: 12px;
    overflow: hidden;
}

.meal-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 8px 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-light);
    animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-indicator span:nth-child(2) {
    animation-delay: -0.16s;
}

.chat-input {
    padding: 16px 20px;
    background: var(--white);
    border-top: 1px solid #E2E8F0;
    display: flex;
    gap: 8px;
    align-items: center;
}

.chat-input input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #E2E8F0;
    border-radius: 20px;
    font-size: 0.9rem;
    background: #F8FAFC;
}

.chat-input button {
    width: 36px;
    height: 36px;
    border: none;
    background: #E2E8F0;
    border-radius: 50%;
    font-size: 1rem;
    cursor: not-allowed;
    opacity: 0.6;
}

.hidden {
    display: none;
}

/* Animations */
@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes typingBounce {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 80px 0;
    background: var(--white);
    border-radius: var(--border-radius);
    margin: 40px 0;
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
}

.coming-soon-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-color), #8B5CF6);
    color: var(--white);
    padding: 8px 24px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 32px;
    box-shadow: 0 4px 12px rgba(107, 70, 193, 0.3);
}

.cta-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.cta-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 40px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Email Form */
.email-form {
    max-width: 400px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.email-input {
    flex: 1;
    min-width: 200px;
    padding: 16px 20px;
    border: 2px solid var(--secondary-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: var(--white);
}

.email-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.1);
}

.submit-btn {
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--accent-color), #8B5CF6);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
    white-space: nowrap;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(107, 70, 193, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.form-note {
    font-size: 0.85rem;
    color: var(--text-light);
    font-style: italic;
}

/* Form Messages */
.form-message {
    margin-top: 16px;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    animation: slideIn 0.3s ease;
}

.form-message--success {
    background: #F0FDF4;
    color: #166534;
    border: 1px solid #BBF7D0;
}

.form-message--error {
    background: #FEF2F2;
    color: #DC2626;
    border: 1px solid #FECACA;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
.footer {
    text-align: center;
    padding: 60px 0 40px;
    color: var(--text-light);
}

.footer p {
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.footer-tagline {
    font-style: italic;
    opacity: 0.8;
}

.footer-links {
    margin-top: 16px;
    font-size: 0.85rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-separator {
    margin: 0 12px;
    opacity: 0.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 40px 0;
    }
    
    .features {
        padding: 60px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .feature-card {
        padding: 32px 24px;
    }
    
    .cta-section {
        padding: 60px 20px;
        margin: 20px 0;
    }
    
    .form-group {
        flex-direction: column;
    }
    
    .email-input {
        min-width: 100%;
    }
    
    .submit-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .feature-card {
        padding: 24px 20px;
    }
    
    .cta-section {
        padding: 40px 16px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
.email-input:focus,
.submit-btn:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Loading state for form submission */
.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.submit-btn:disabled:hover {
    transform: none;
    box-shadow: none;
}